YOu don't need to write these two import statements because these classes are in the same package which you are importing. So, I took out this import lines before compiling them. Again make sure your folder c:\javatemp\hourstracker has been spelled as HoursTracker. Java is case sensitive and folder names in different cases create problems. So, rename "c:\javatemp\hourstracker" to "c:\javatemp\HoursTracker" because your package name in all classes is "HoursTracker". Then compile your class as:javac -classpath c:\javatemp c:\javatemp\HoursTracker\HoursTrackerGUI.javaHopefully, it will work.ThanksKishori